Express in terms on i.

label Algebra
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Express 2 square root -65 in terms of i

Nov 12th, 2014

2 * sqrt(-65), right?

First observe that -65 = -1 * 65. The nature of square roots is such that sqrt(-1) * sqrt (65) = sqrt (-65).

We know that sqrt(-1) is i, and you can find sqrt(65) on a calculator (should be just a hair above 8).

(Did you get 8.06i?)

Nov 12th, 2014

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Nov 12th, 2014
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Nov 12th, 2014
Oct 23rd, 2017
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